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NCS12

S12

12C

RX LEVEL

VR2

TX LEVEL

SW1

RX RANGE

SW3

OFF

ON

OFF

3019 Alvin DeVane Blvd.
Ste. 560
Austin, TX 78741
Phone: (650) 965-8020

CORPORATION

®

TECH SUPPORT: 650-965-8020 ext. 703

Questions or technical issues? Please call:

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RX Audio level is normally 

set by the volume control on 

the mobile radio.

If further adjustment is 

needed, RX LEVEL control 

VR2 can be used to adjust 

RX volume.

MS-900SP Controls and Adjustments

TX Audio level is normally factory-preset to the correct level for the 

radio type specified when the MS-900SP is ordered.

If a different TX level is required the TX LEVEL SW1 can be set 

from 0 (highest) to F (lowest) to accommodate various radios.

Call Setcom Tech Support for assistance if needed.

MS-900SP shown with top cover removed:

N    O

1     2

If RX LEVEL control VR2 does not provide 
enough adjustment range, the RX RANGE 

switch SW3 can be set to allow higher or 

lower level settings.

RX RANGE

SW3

(shown enlarged)

ON

OFF

To increase RX Level, 
set section 1 to ON

To decrease RX level, 
set section 2 to ON

Do not set both sections 
to ON, use only one 
section or the other

Section 2

Section 1

For Factory Calibration

DO NOT ADJUST

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